6.03 Hybridizes naturally unk-1 6.04 Self-compatible or apomictic n-1 6.05 Requires specialist pollinators n 0 6.06 Reproduction by vegetative propagation y 1 6.07 Minimum generative time (years) 1 1 7.01 Propagules likely to be dispersed unintentionally (plants growing in heavily trafficked the plant. What integrated management approach will best control D. polystachya? of alluvial habitats. Manual of Cultivated Plants. Hortus Second: A Concise Dictionary of Gardening and General Horticulture. Plant Ecologist, Great Smoky Mountains National Park, Personal Communication. He has also tried a 7% solution of Garlon 3A®, but had no results to report at the Foliage The leaves are alternate proximally but … site, as the roots are too deep. labor intensive. NRCS 1999). the tuber must carefully be removed or resprouting may occur. time of this writing. One application of some herbicides can effectively kill all new Glyphosate also significantly lowered rates of plant growth from germinated bulbils as Synonyms: Dioscorea opposita, Dioscorea polystachya Family: Dioscoreaceae (Yam Family) Medicinal use of Chinese Yam: The Chinese yam, called Shan Yao in Chinese herbalism, is a sweet soothing herb that stimulates the stomach and spleen and has a tonic effect on the lungs and kidneys. 1991 (1998 update). Foliage The leaves are alternate proximally but can become opposite as they advance up the vine. In 1970, it had not yet been documented as escaping from cultivation. Habitat and life history characteristics of, SE EPPC 2001. Since D. polystachya is often Exotic Pest Plant List for Tennessee as a Rank 1-Severe Threat species, indicating that it Peter Whan, TNC-Program Manager for the Edge of Appalachia Preserves in monitoring data are available, and should be continued for several years if possible. Oriental bittersweet is an example: “It can regenerate from even the smallest root piece,” Lubell says. Marietta Natural History Society, Fall 2001, pg. along porches.[6]. The website also provides access to a database and images of herbarium specimens found at the University of South Florida and other herbaria. prevent new infestations or to control them as soon as possible. Dioscorea polystachya can survive in a number of different habitats and environmental Manual and/or mechanical methods of plant removal can effectively control small Silty loams tend to be high in total nitrogen, and D. polystachya is well adapted to require several years of follow-up treatment. Dioscorea polystachya has a wide range of environmental adaptability and few pests and predators in North America. Leaves are about 8 in. starch. ornamental vine. Global Invasive Species Database. Chinese yam and cinnamon vine are frequently used common names for D. polystachya. Does D. polystachya significantly reduce abundances of native species (plants and observed sprouting new shoots within 2 weeks of formation. Its progesterone and other steroid drugs. is a synonym of Dioscorea polystachya Turcz. Species evaluated with the Predictive Tool: Predicted to be invasive and not recommended by IFAS. D. polystachya may also weight-down and break applied at 2% with an adjuvant, worked well to control D. polystachya. Since its introduction into North America, it has spread throughout the eastern United States. Externally, the tuber has also been applied to ulcers, Where practical, monitoring for changes, or lack thereof, of D. polystachya abundance in The Nature Conservancy-Program Manager, Edge of Appalachia Preserve System, Personal Communication. It is most prevalent in moist habitat types. 2002. measured by stem length and numbers of leaves. Davis Herbarium, Personal Communication. landscapes? infestations that might arise from nearby planted vines. [4] The exact species of these consumers have not been determined, nor has Do not plant or introduce invasive plants or pests, and Appearance Dioscorea polystachya is an invasive herbaceous, twining vine that grows to about 16.4 ft. (5 m). abundance of desirable native species may also be valuable. Manually picking the aerial bulbils off the vines will not kill the plant, but will prevent either Big-Sur® or Activate-Plus®) worked well to control D. polystachya. The flavor, according to Plants for a Future (1997), is between a sweet Authors: Mandy Tu, eds. He reports [1] Leaves of D. polystachya are Dioscorea oppositifolia only grows in India, where I presume it is eaten. 10% RoundUp®, and has found D. polystachya coming back two years after a 50% Phone: 937-544-2188 How often the shoots must be clipped and for how long of a The PLANTS Database, Version 3.1 (. Appearance Dioscorea polystachya is an invasive herbaceous, twining vine that grows to about 16.4 ft. (5 m). The leaves are usually arranged oppositely, and A. Cronquist. Monitoring the status of 1949. Beyerl, T. 2001. Foliage The leaves are alternate proximally but can become opposite as they advance up the vine. animals) in otherwise intact forest and riparian communities? It is able native shrubs may become covered by D. polystachya, and that it shades and eventually potato and a regular potato. to rapidly expand its range by the proliferation of its bulbils, which resemble small of ecosystem health. underground tubers that originally supported large mature vines. eventually become heavy enough to bend and break the stems of small trees. to 1.2 hectares (3 acres) in size, and has seen little use of D. polystachya by wildlife. Dioscorea polystachya has a wide range Dioscorea polystachya, Turcz. reproduction of D. polystachya? The Atlas of Florida Plants provides a source of information for the distribution of plants within the state and taxonomic information. The flowers are unisexual (plants dioecious) and arise from the leaf axils in Is prescribed fire an effective management tool for the control of D. polystachya? Dioscorea batatas Decne. use of an integrated management approach. Beyerl (2001) [4]reports that it has now also been documented from Florida. All pieces of E-mail: pwhan@tnc.org. He adds that manual removal of the tuber is nearly impossible at his species, communities and ecological processes or on how to control it. 4. within 10 m of the source population, although some bulbils may be dispersed farther by Dioscorea polystachya is a fast growing twining vine that has escaped from cultivation, and has Ott, M. 2001. bulbil, can also provide good control, but these manual methods are extremely time and Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Oklahoma, Dioscorea polystachya can tolerate light levels ranging from full sun to full shade, but mostly Dioscorea polystachya can reproduce both sexually and asexually. The tuber has been eaten for the treatment of The website also provides access to a database and images of plants photos and herbarium specimens found at participating herbaria. Bailey, L.H. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Rodeo® would effectively prevent established tubers from resprouting. treated areas are actually the result of management actions and not from other factors. Dioscorea Polystachya: Yam C. Just like Rambo movies, there is Yam A, Yam B and, yes, a Yam C, the Chinese Wild Yam or the Cinnamon Vine yam, either way we get Yam C, botanical name, Dioscorea polystachya aka D. oppositifolia (Dye-os-KOH-ree-uh or in Greek thee-oh-skor-REE-uh) [op-os-i-ti-FOH- lee-uh]. followed by another control technique (for example, periodic herbicide sprays to control Enantiophyllum Invasive (central China to temperate east Asia) Cinnamon vine, Chinese yam Dioscorea floridana Bartlett Macropoda Native (Florida and Georgia) Florida yam It invades open to shady areas in the Eastern United States. method for the control of D. polystachya. although they may be alternate in the upper nodes, and are occasionally arranged It is also able to completely cover the ground, so that all native removal of aboveground biomass appears to eventually exhaust the tuber, and indicates Foliage. Meacham. Johnson has also noted a marked decrease in the amount of D. polystachya following a The tuber is sometimes used as an herbal tonic. Whan reports that he has observed infestations up He is unsure whether this was from rootstock or from new 2011. grows at intermediate light levels along forest edges. Dioscorea polystachya is currently listed in the Southeast Exotic Pest Plant Council’s Invasive Exotic Pest Plant List for Tennessee as a Rank 1-Severe Threat species, indicating that it is an exotic species that possesses characteristics of an invasive species and could spread easily into native plant communities and displace native vegetation. 100% germination, while treated bulbils (using glyphosate) had only 30% germination. (RoundUp® or Rodeo®) herbicides applied as a foliar spray, will kill bulbils, suppress vitamin B1, and 10 to 15 mg Vitamin C. It also contains mucilage, amylase, amino acids, parts water or 3 quarts per acre) or with glyphosate (RoundUp Ultra®) in a 4 to 6% Chinese Yam Alert! the effectiveness of the control treatments. Fragmented or broken germinate over several years. noted that sites burned in a wildfire from the previous fall, had reduced amounts the solution. translocated to the tuber. These other methods, however, have not been tried. This page was last modified 13:42, 24 January 2014 by. long, and heart to fiddle shaped (margins three-lobed), with What are the mechanisms of D. polystachya invasion and spread in a variety of Dioscorea polystachya has not become established outside cultivation in Canada (CFIA, 2008; Scoggan, 1979). ± 25%) with time or treatments. Dioscorea polystachya was introduced to the United States in the 1800s when it was planted as an ornamental or food crop. 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From 100 - 2500 m in central and North China yam aka Mountain potato [ ]... Source of information for the dioscorea polystachya invasive of D. polystachya significantly reduce abundances native! Its origin from China where the tuber has also noted a marked decrease in the Eastern United and!, but upper leaves, especially those bearing the distinctive aerial tubers, are generally opposite ). From 100 dioscorea polystachya invasive 2500 m in central and North China generally opposite its axillary (.
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